The Missing Semester of Your CS Education from MIT

MIT just introduced a new course called “The Missing Semester of Your CS Education“. All of the lectures are available on YouTube and course notes are available at their course website. This is going to be a great resource for Computer Science students, Programmers, and Makers all over the world.

Classes teach you all about advanced topics within CS, from operating systems to machine learning, but there’s one critical subject that’s rarely covered, and is instead left to students to figure out on their own: proficiency with their tools. We’ll teach you how to master the command-line, use a powerful text editor, use fancy features of version control systems, and much more!

The Missing Semester of Your CS Education

Mount SFTP over SOCKS Proxy in OSX with Cyberduck

I can only access certain servers at work over SSH if I am using a machine with a certain static IP address. I wanted to be able to mount the servers file space using SFTP on a Macbook Air when I am either at home or at  a remote location. I investigated a lot of different ways to accomplish this with little success. After a lot of trial and error I was able to create a Socks proxy to my work machine using ssh and then mount the server file systems by using Cyberduck and enabling the use of the socks proxy.

Network Diagram
Network Diagram

First, I needed to create the socks proxy. In order to do this I had to SSH into my work machine and dynamical forward a port 8080. You may forward any port that is not being used greater than 1024. This will send any traffic on that port through the tunnel and out of the machine that you are connected to.

ssh [email protected] -D8080

After I have created the SSH connection with the dynamic port forwarding, I enabled the socks proxy in OSX Network Preferences -> Advanced -> Proxies. Check the “SOCKS Proxy” box. Then, set the “SOCKS Proxy Server” to Finally, add the IP or Domain of the machine that has the SSH connection to the “Bypass proxy settings for these Hosts & Domains” box.

OSX Socks proxy settings
OSX SOCKS Proxy Settings

Now enable the proxy in Cyberduck. Go to “Cyberduck” -> “System Preferences” -> “Connection” and check the box that says “Use system proxy settings”.

Cyberduck system preferences for proxies
Cyberduck system preferences for proxies

Now every connection in Cyberduck will flow through your SOCKS proxy that you set up so you can mount the remote server file system over SFTP.